JsonClientHandler (JMRI API)

java.lang.Object
- jmri.server.json.JsonClientHandler

```
public class JsonClientHandler
extends java.lang.Object
```
Handler for JSON messages from a TCP socket or WebSocket client.

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String HELLO_MSG
When used as a parameter to onMessage(java.lang.String), will cause a "hello" message to be sent to the client.

Constructor Summary

Constructors
Constructor Description

JsonClientHandler(JsonConnection connection)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected java.util.HashMap<java.lang.String,java.util.HashSet<JsonSocketService<?>>>`	`getServices()`
`void`	`onClose()`
`void`	`onMessage(com.fasterxml.jackson.databind.JsonNode root)`	Process a JSON node and handle appropriately.
`void`	`onMessage(java.lang.String string)`	Process a JSON string and handle appropriately.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - HELLO_MSG
```
public static final java.lang.String HELLO_MSG
```
    When used as a parameter to onMessage(java.lang.String), will cause a "hello" message to be sent to the client.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - JsonClientHandler
```
public JsonClientHandler(JsonConnection connection)
```
- Method Detail
  - onClose
```
public void onClose()
```
  - onMessage
```
public void onMessage(java.lang.String string)
               throws java.io.IOException
```
    Process a JSON string and handle appropriately.
    See jmri.server.json for expected JSON objects.
    
    Parameters:
    
    string - the message
    
    Throws:
    
    java.io.IOException - if communications with the client is broken
    
    See Also:
    
    onMessage(JsonNode)
  - onMessage
```
public void onMessage(com.fasterxml.jackson.databind.JsonNode root)
               throws java.io.IOException
```
    Process a JSON node and handle appropriately.
    See jmri.server.json for expected JSON objects.
    
    Parameters:
    
    root - the JSON node.
    
    Throws:
    
    java.io.IOException - if communications with the client is broken
    
    See Also:
    
    onMessage(java.lang.String)
  - getServices
```
protected java.util.HashMap<java.lang.String,java.util.HashSet<JsonSocketService<?>>> getServices()
```